Improvement in securing steam-boiler tubes in tube-sheets



W.MOORHOUSB lmptovementin Secung Steam BoHer Tubes in Tube Sheet& N0,125,321, Patented April2,1872.

O Q11 (D O O 0r o o Q @G t ,GO

joven/Z579' Ulvrrnn S'rnfrns jPnirnlv'r OFFICE.

Y WALTER MOORHOUSE, OF PHILADELPHIA, PA., ASSIGNOR TO HIMSELF,

WILLIAM MOORHOUSE, AND JOSEPH FIELD, OF SAME PLACE.

Specification forming part of Letters Patent No. 125,321, dated April 2,1872. l

To all lwhom it may concern:

Be it known that I, WALTER MooRHoUsE, of the city a-nd county ofPhiladelphia and State of Pennsylvania, have invented new and usefulImprovements in Steam Generators; and I do hereby declare the followingto be a clear and exact description of the nature thereof, sufficient toenable others skilled in the art to which my invention appertains tofully understand, make, and use the same, reference being had to theaccompanying drawing making part of this specification, in which- Figurel is a side view of the device illustrating my invention. Fig. 2 is atop or plan View thereof. Fig. 3 is a front view, the faceplate beingremoved. Fig. t is a vertical longitudinal section thereof.

Similar letters of reference indicate correspondin g parts in theseveral iigures.

This invention relates to improvements in steam-generators 5 andconsists in the mode of securing the tubes to the tube-sheet.

Referring to the drawing, A represents the water-tank, with whichcommunicate the tubes B B'. The. tank A forms receptacles for water,which ows thereinto from one set of tubes, and flows therefrom throughanother set of tubes. The tank is divided transversely by partitions DD, so as to form a series of divisions or compartments, C C' O" 0"',which are arranged one above the other, or side by side. The back plateof the tank forms the tubesheet D', and. to this sheet are secured thetubes B B. The tubes are arranged in pairs, and the pair is connected atone end by a cap, E, so that the tubes will communicate at that end. Thetubes at the other end are connected to the tube-sheet D', as follows: Aportion of the length of each tube is made tapering at the ends oppositeto the caps, and enters tapering or conical openings F in the tube-sheetD'. Nuts G iit on threads cut or formed on said tapering ends of thetubes, and bear against the tube-sheet.

It will be seen that by tightening up the nuts the tapering ends of thetubes are drawn into the conical openings of the tube-sheet, and thusthe joint issnug and secure. In cases of leakage or loosening of thetubes the operation of tightening can be continued, there being noobstruction by shoulders, and consequently no weakening of the tubes bythe latter appliances.

The 'tubes B B' constitute a pair, of which one end is connected to thecap and the other end to the tube-sheet. One tube, B, of the pair willcommunicate with one compartment of the tank A, and the other tube, B',with the adjacent compartment, so that, as the'water is fed into thelower compartment O, it passes through the lower tubes B; then by thecaps into the tubes B', partment C', then continues through the nexttubes B and B' into the compartment C", and so on until it reaches thedrums H, from whence it is conveyed to the feeding-tank O by means of apipe, J. rlhus there is a continuous circulation of water. Thecompartments or chambers will be filled with water, and the latter owsthrough the tubes with equal pressure, and without strain on the joints.

The arrangement of the tubes is such that a series of passages, K, areleft between every two vertical rows of the tubes, so that in case it isdesired to remove any pair of the tubes,

the nuts being unscrewed, the tubes must be struck or forced from thetube-sheet so as to clear it, and they may then be lowered or let downby the right or left through one of the passages K into the hre-chamber,and withdrawn at the space L of the furnace-doors.

By this arrangement the other tubes will not be disturbed, and noportion of the niasonry-work torn down or destroyed to accomplish theremoval of the tubes.

By removing the face-plate of the tank the ends of the tubes areaccessible, and the operation of tightening the latter is readilyperformed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

and into the coinl. The tubes B B having conical ends, as theWatcrAcompartments of the tank, in cona described, arranged in pairs,with the tubes nection with the nuts and the tube-sheet, subconstitutingthe pair communicating with difstuntially as described.

ferent compartments of the tank A, all as set The above signed by methis 28th day of A fol th. February, 1872.

2. The tubes formed with conical ends, and WALTER MOORHOUSE. enteringconical openings in the tube-sheet, in connection with thetightening-nuts, sub- Witnesses: sta'ntially as described. JOHN A.WIEDERSHEIM, 3. The conical-ended tubes projecting into THEO. E.WIEDERSHEIM.

